How to make an electroscope
Electroscope serves to demonstrate the presence of a static electric charge. It is based on the fact that electricity like charged particles repel or body. Electroscope can also serve as an indicator of air ionization, which is used for radiation detection. If electroscope calibrated, then it can be used to measure the electric charge. Such a device called an electrometer.
You will need:
- transparent glass vessel having a rubber stopper; - A thin aluminum foil; - Nail length 10-15 cm; - Nitrocellulose glue; - Drill; - Hair dryer; - Plastic comb.
Instruction how to make an electroscope
Take the rubber stopper. Make a hole in it so that the nail or screw is plugged into the plug and not dangling.
Foil strip cut length 6 cm and 1 cm wide. Fold strip half. In the middle of the fold line pierce a hole and put a strip on a nail under the most hat or screw up his head. Secure the strip to the nail a small drop of glue at one point so that the adhesive does not flow into the gap between the nail and foil. Be sure to provide a clear contact between the foil and nail. In the case of a screw nut can be fastened foil.
Bend the ends of the strips down so that they are parallel to each other. Insert a nail or screw into the tube so that its end protruded from the other side of tube at least 3-5 cm. In this case the foil should not touch the bottom of the vessel if the plug inserted therein.
With the help of a hair dryer, thoroughly dry the container and insert the plug so that the petals were inside foil and hanging down. Electroscope ready.
Check the operation of the device. Take a plastic comb and run it a few times on a clean, dry hair. Now tap comb metal rod electroscope. Petals should acquire the same charges and repelled from each other, standing at an angle to each other, or even horizontally. Tap the pin. The charge must drip off, and the petals will electroscope original position.